C# 0 The Complete Reference

if

 statement. If 

i

 is zero, then the outcome of the 

if

 is false. Otherwise, if 

i

 is non-

zero, then the outcome of the 

if

 is true if 

i

 is even and false if 

i

 is odd. Thus, only even, non-

zero divisors are allowed. Although this example is somewhat contrived for the sake of 

illustration, such constructs are occasionally very useful.

Spacing and Parentheses

An expression in C# can have tabs and spaces in it to make it more readable. For example, 

the following two expressions are the same, but the second is easier to read:

x=10/y*(127+x);

x = 10 / y * (127 + x);

Parentheses can be used to group subexpressions, thereby effectively increasing the 

precedence of the operations contained within them, just like in algebra. Use of redundant 

or additional parentheses will not cause errors or slow down execution of the expression. 

You are encouraged to use parentheses to make clear the exact order of evaluation, both for 

yourself and for others who may have to figure out your program later. For example, which 

of the following two expressions is easier to read?

x = y/3-34*temp+127;

x = (y/3) - (34*temp) + 127;

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